Physics – Condensed Matter – Materials Science
Scientific paper
1998-03-24
Physics
Condensed Matter
Materials Science
10 pages, REVTeX, 12 postscript figures
Scientific paper
10.1103/PhysRevE.58.1568
We study two closely related, nonlinear models of a viscoplastic solid. These models capture essential features of plasticity over a wide range of strain rates and applied stresses. They exhibit inelastic strain relaxation and steady flow above a well defined yield stress. In this paper, we describe a first step in exploring the implications of these models for theories of fracture and related phenomena. We consider a one dimensional problem of decohesion from a substrate of a membrane that obeys the viscoplastic constitutive equations that we have constructed. We find that, quite generally, when the yield stress becomes smaller than some threshold value, the energy required for steady decohesion becomes a non-monotonic function of the decohesion speed. As a consequence, steady state decohesion at certain speeds becomes unstable. We believe that these results are relevant to understanding the ductile to brittle transition as well as fracture stability.
Langer James S.
Lobkovsky Alexander E.
No associations
LandOfFree
Dynamic ductile to brittle transition in a one-dimensional model of viscoplasticity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Dynamic ductile to brittle transition in a one-dimensional model of viscoplasticity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamic ductile to brittle transition in a one-dimensional model of viscoplasticity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-280161